Rotary engine.



No. 724,224. l PATBNTBD MAR. a1. 19043. I

J. WIECHMANN. l

ROTARY ENGINE.

APPLICATION FIL'BD DBO. 17, 1902.

A TTOHNE YS.

NTTED ST1-rifles;

,PATENT OFFICE.

JOHN -w1EcHMANN, or ALBANY, NEW YORK.

ROTARYt SPECIFICATION forming part of Letters PatentNo'. 724,224, datedMarch 31, 1903. Application filed December 1'7, 1902. rrSperial'No.125,483. (No model.)

T0 all whom it may concern.:

Be it known that I, JOHN WIECHMANMa citizen of the United States, and aresident ofV Albany, in the county of Albanyand Stateof:`

New York, have invented a new andlmproved' Rotary Engine and Pump,ofiwhichv-the .fol-l and parts and combinations ofthesame, asv will bemore fully described hereinafter and i then pointed ont in the claims.

A practical embodiment ,of the invention-is represented in theaccompanying'drawings,-' forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in alltheviews.,

Figure l is a longitudinalV sectional. eleva, tion of the improvement on-the line 1.1 of- Fig. 2. Fig. 2 is a transverse section of thel same onthe line 2 2 of Fig. lg'and' Fig.V 3 is a reduced transverse sectionfofA thesame,` showing the parts in a diiferent; position.

The cylinder A of the rotary engine is'pro` vided with heads A' andA2,'in which iscen-4 trally journaled a main shaft B, formed between thesaid heads with a crank B', polygonal in cross-section and engaging acorrespondingly-shaped elongated opening C in asleeve C, on which ismounted to turn looselyV a cylindrical piston D in rolling contact withthe inner face of the cylinder A. The lperipheral surface of the pistonD is engaged `by the inner end of an abutment E, mounted to slide inbearings F, extending radially from l the cylinder A, preferably at thetop thereof,- and the said abutment E is provide'd'with a stem E',extending through a stuffing-,box F', to connect at its outer end with across-,head

G, carrying rods or stems l-I, passing through' stuffing-boxes F2 intobearings F3, likewise arranged on the cylinder on opposite sides of. thebearings F. The rods H are secured at their inner ends to slides H',mountedto move in the bearings F3 and pivotally connectedVv with therods I of rings I, mounted to turn on the ends of the sleeve C to formwith the gthef'engine is in operation the slides H receive anup-and-downslidingmotion in their j bearingsF2, and this up-and-downmovement ,Ofh'eSlides is tran mitted'by the rods H, cross-head G, and ste QE' totheabutment E 'to move the latter ,up and down in unison with'the ,rollingover 'of the piston D within the cylinder A.

`-lnto the cylindenA opens an inlet-port a adjacent .to the entrance ofthe abutment I intothefcylinderiA, and the said port a leads from avalve-,chamber J, containing a cut-olf valveK' and connected at one endby a pipe QL with a boiler or v'other motive-agent supply. Anexhaust-port b leads from the cylinder A on` the opposite site-of theabutment entrance,andlthis port is connected with an exhaust-pipe J.'for carrying off the exhaust motive agent. N ow 'when the valve K is{openedthen the vmotive agent passes by way of the port a, into' thecylinder, betweenthe abutment E and thecontact-point of the pis- .ton Dwith the cylinder A, so that the piston D is pressed on by the steam toturn the shaft B in the direction of the arrow a', the piston rollingover on the inside of the cylinder A. jThezvalve Kis normally held in aclosed po- -sition by a spring K', and on the outer end of the stem K2ofthe saidvalveK is secured an arm K3, normally extending into the pathof a pin- N', held on the rod N2 of an eccentric N, mounted on the shaftB, as plainly indicated in the drawings. Now as soon as thecontact-point between the piston D and the cylinder A has passed theport or then the Veccentric N by the rod N2 and pin N' imparts aswingingmotion to the arm K3 to move the valve K to an open position, sothat the motive'agentcan pass through the port o. into the cylinder A toturn the piston D in the direction of the arrow a'. Now it is under#stood that as the piston D is mounted on the 'cijank B of .the mainshaft B a turning motion is'givenv to the said main shaft, wherebythe'piston is carried-eccentrically'around in thecylinder A, withtheperipheral-surface ofthe cylinder rolling over n ltheinner-surff'a'ceofthe'cylinder A. When the piston D 4 eccentrics on the shaft B,so that when IOO arm K3, so that the valve K remains closed by theaction of the spring K until the no-rmal rate of speed is again reached.Now in order to govern the rod N2 for the purposev mentioned I providethe said rod with an elongated slot N3, into which projects a pin. O',held on one end of a bell-crank lever O, pivotally connected atits otherarm by a link O2 with a governor P, so that on an increase of speed thegovernor ulls the link O2 upward to impart a swingilng motion to thebellcrank lever O, whereby the rod N2 is swung to one side to swing thepin N' out of the path of the arm K3. Thus the following downwardmovement of the eccentricNdoes not alfect the valve K, as the pin Npasses the free end of the arm K3 Without imparting a swinging motionthereto. The governor P is driven from the shaft B by a suitablepulley-and-belt connection Q, as indicated in Figs. l and 2.

In order to take up the rear of the piston D within the cylinder A, thesleeve C is engaged by pins R, mounted to slide radially in thecrank-arm B of the main shaft B, and the inner ends of the said arms Aare beveled to engage corresponding bevels on rods R', mounted to slidelengthwise in the shaft B, as shown in Fig. l. The ends of the rods Rare engaged by screw-rods R2, screwing in the ends of the shaft B, so asto force the rods R inward to cause their bevels to act on the bevels ofthe rods R to pus'h the same outward in the crank-arm B, so as to bringthe peripheral face of the piston D in firm contact with theinnersurface of the cylinder A.

The main shaft B is provided with suitable pulleys B2, connected bybelts with other machinery to be driven.

The inner end of the abutment E is provided with a packing-ring E2,mounted to rock in the abutment, to make at all times a firm contactwith the peripheral face of the piston D, to prevent leakage of steamfrom the inlet side of the cylinder to the exhaust side thereof, as willbe readily understood by reference to Figs. 2 and Having thus describedmy invention, I claim as new and desire to secure by Letters Patent- 1.A rotary engine comprising a cylinder, a crank-shaft mounted to turn inthe cylinder, a sleeve held on the crank-arm of said shaft, acylindrical piston mounted to turn on said sleeve and in rolling contactwith the inner surface of the cylinder, a sliding abutment in thecylinder engaging the peripheral :face of said piston, and slides,connected 'with the said sleeve and with the said abutment, as setforth.

2. A rotary engine, comprising a cylinder, a crank-shaft mounted to turnin the cylinder, a sleeve held on the crank-arm of the shaft, acylindrical piston mounted to turn on said sleeve, an abutment mountedto slide in bearings extending radially from the cylinder and engagingthe peripheral face of said piston, and slides mounted to move inbearings arranged on the cylinder at opposite sides of the bearings forthe abutment, and connected with the said abutment and with the saidsleeve, as set forth.

3. A rotary engine, comprising a cylinder, aerank-shaft mounted to turnin the cylinder, a sleeve held on the crank-arm of said shaft, acylindrical piston mounted to turn on said sleeve and in rolling contactwith the inner surface of the cylinder, a sliding abutment in thecylinder engaging the peripheral face of said piston, the said abutmentbeing provided with a stem connected at its outer end with a cross-head,slides mounted to move in bearings at opposite sides of the bearings forthe abutment and provided with rods connected with said cross-head, andrings mounted to turn on the ends of the sleeve and forming with thelatter eccentrics on'the main shaft, the said rings being connected byrods with the said slides, as set forth.

4f. A rotary engine comprising a cylinder having a valve-controlledinlet, an exhaust, an abutment slidable in and out of the cylinderbetween the said inlet and the said exhaust, a crank-shaft mounted toturn in the said cylinder,a sleeve adjustable transversely on thecrank-arm of' the said crank-shaft, a cylindrical piston mounted to turnon the said sleeve and in rolling contact with the inner surface of thesaid cylinder and engaged by the said abutment, and slides driven fromthe crank shaft and connected with the said abutment to actuate thelatter in unison with the movement of the piston in the cylinder, as setforth.

5. A rotary engine comprising a cylinder, a crank-shaft mounted to turnin the said cylinder,a cylindrical piston mounted on the crank-arm ofthe shaft and in rolling contact with the inner surface of the cylinder,a sliding abutment in the cylinder, engaging the peripheral face of thesaid piston, and slides operatively connected with the crank-shaft andconnected with the said abutment, to actuate the latter in unison withthe movement of the piston in the cylinder, as set forth.

6. A rotary engine comprising a cylinder, a crank-shaft mounted to turnin the said cylinder, a cylindrical piston mounted on the crank-arm ofthe shaft and in rolling contact with the inner surface of the cylinder,a sliding abutment in the cylinder, engaging the peripheral face of thesaid piston, and a valve controlling an inlet for the said cylinder andopened from the said shaft, as set forth.

ITO

7. A rotary engine comprising a cylinder, a crank-shaft mounted to turnin the said cylinder, a cylindrical piston mounted on the crank-arm ofthe shaft andin rolling contact with the inner surface of the cylinder,a sliding abutment in the cylinder, engaging the peripheral face ofthesaid piston, a valvecontrolled inlet for the said cylinder, means foropening the valve from the said shaft, and a spring for closing thevalve, as set forth.

8. A rotary engine comprising a cylinder, a crank-shaft mounted to turnin the said cylinder, a cylindrical piston Inounted on the crank-arm ofthe shaft and in rolling contact with the inner surface of the cylinder,a sliding abutment in the cylinder, engaging the peripheral face of thesaid piston, a valve for controlling the inlet to the said cylinder, aspring for normally closing the valve, an eccentric device on thecrank-shaft, connected with the valve, for opening the same, and agovernor connected with the eccentric device, for moving the latter outof engagement with the valve when the engine runs beyond a normal rateof speed, as set forth.

9. A rotary engine comprising a cylinder having a valved inlet, anexhaust, an abutment sliding in and out of the cylinder, a crank-shaftmounted to turn in the said cylinder and connected with the saidabutment, to actuate the latter, a sleeve held on the crank-arm of thesaid shaft, a cylindrical piston mounted to turn on the said sleeve, andmeans for adjusting the said sleeve, to hold the piston in rollingcontact with the inner surface of the cylinder, as set forth.

l0. A rotary engine provided with a cylinder, a crank-shaft mounted toturn therein,`

a sleeve slidable transversely on the crankarm of the said crank-shaft,means for adjusting the said sleeve transversely on the said crank arm,and a cylindrical piston mounted to rotate loosely on the said sleeveand in frictional contact with the inner surface of the said cylinder,as set forth.

1l. A rotary engine, comprising a cylinder, a crank-shaft mounted toturn therein, a sleeve slidable transversely on the crank-arm of thesaid shaft, a cylindrical piston mounted to rotate on the said sleeve,pins mounted to slide in the crank-arm of the shaft and engaging thesaid sleeve, and means for moving the said pins to adjust the sleeve andpiston, as set forth.

l2. A rotary engine, comprising a cylinder, a crank-shaft mounted toturn therein, a sleeve adjustable transversely on the crankarm of theshaft, a cylindrical piston mounted to turn loosely on the sleeve, andmeans for adjusting the sleeve to hold the piston in rolling contactwith the inner surface of said cylinder, the said means comprising pinsmounted to slide radially in the crank-arm of the main shaft andengaging the said sleeve, the said pins having beveled ends, rodsmounted to slide lengthwise in the main shaft and having correspondingbevels for engaging the bevels of the pins, and means for forcing thesaid rods inward, as set forth.

13. A rotary engine, comprising a cylinder having an inlet and anexhaust, a crank-shaft mounted to turn in the said cylinder, the crankbeing polygonal in cross -section, a sleeve having acorrespondingly-shaped elongated opening engaged by the said crank, acylindrical piston mounted to turn on the said sleeve, an abutmentslidable in and out of the cylinder between the said inlet and exhaust,and engaging the peripheral face of the said piston, a valve controllingthe inlet for the cylinder, means for opening the said valve from theshaft, and means for adj usting the sleeve on the shaft to hold thepiston in rolling contact with the inner surface of the cylinder, as setforth.

14. A rotary engine, comprising a cylinder. having an inlet and anexhaust, a crank-shaft mounted to turn in the said cylinder, acylindrical piston mounted on the crank-arm of j the shaft, a slidingabutment between the inlet and the exhaust and engaging the peripheralface of said piston, a normally closed valve for controlling the inletto said cylinder, a governor driven from the crank-shaft, and meansactuated from the crank-shaft for opening said valve, the said meansbeing controlled from the governor, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN WIECHMANN. Witnesses:

FRANK MLLER, ALBERT MEIER.

